Power-split Drives with Mechanical Variators

Infinite variable transmissions with hydrostatic variators are the dominant drive technology in the agricultural machinery sector. Compared to hydrostatic variators, mechanical CVTs have significant advantages in terms of noise level and system efficiency, but are seldomly used because of their limited torque capacity and limited ratio range. In order to compensate these specific disadvantages of mechanical CVTs, they can be used in power-split drives with one or more driving modes. To determine the application limits of these drives, an automated optimisation tool for power-split gearboxes, developed by the Institute for Machine Elements and Machine Design is used. Subsequently, a prototypical concept based on the mechanical cone-ring variator of the GIF-Entwicklungsgesellschaft for a small-tractor application is presented.

Mechanical CVTs in the Agricultural Machinery Sector

In the recent decades, the development of mechanical CVTs has been driven by the Asian automotive industry....

Keywords

Planetary Gear Ring Gear Driving Mode Tractive Effort Lawn Mower

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